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**callum155** 1. a book costs £7.34 work out the cost of 25 books

2. 20 of the maths books have plastic covers. write 20 out of 25 as a percentage

3. simplify fully - 6n + 7n-8n, 4a x 5b

4. multiply out - 3(2x + 5)

5. Work out 60% of 5300kg

find the simple interest on £2500 for 2 years at 6% per year.

6. a shop sells different sound systems on credit. the weekly payment is w pounds. the total amount paid, c pounds, is given by the formula c = 10w + 35.

the total amount paid for a mini sound system is £260.

calculate the weekly payment for a mini sound system